Widia 4143935 Screw Machine Drill Bit 4.60mm Carbide

Product Description

The WIDIA 4143935 is a screw machine length drill bit engineered for high-performance hole-making in a wide range of industrial materials. Built from solid carbide and coated with TiAlN, it delivers extended tool life and heat resistance in demanding machining applications. The 4.60 mm diameter bit features a 140-degree web-thinned point that reduces thrust force and improves centering accuracy at entry. With a 2-flute regular spiral design and an overall length of 66.00 mm, this bit is suited for short-reach drilling in CNC machining centers, drill presses, and automated production equipment. Machinists and toolroom technicians working in job shops or production environments are the primary users.

This drill bit is designed for general-purpose drilling in steel, stainless steel, cast iron, aluminum and non-ferrous metals, and high-temperature alloys. Its screw machine length profile makes it ideal for applications where rigidity and minimal runout are critical, such as close-tolerance hole drilling in fixture work, component manufacturing, and production runs where tool consistency matters. The straight cylindrical shank is compatible with standard drill chucks and collet holders sized for the 6.00 mm shank diameter.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• TiAlN coating provides thermal resistance and extends tool life in dry or semi-dry cutting
• 140-degree web-thinned point reduces entry thrust and improves self-centering
• Screw machine length body delivers added stiffness and reduced deflection versus jobber-length bits
• 2-flute regular spiral flute geometry supports efficient chip evacuation in a variety of workpiece materials
• Right-hand cutting direction compatible with standard CNC and manual spindle rotation

Compatibility

Designed as a general-purpose screw machine length drill for use in standard drill chucks and collet systems accepting a 6.00 mm straight cylindrical shank. Suitable for drilling steel, stainless steel, cast iron, aluminum and non-ferrous metals, and high-temperature alloys per Series VDS201A specifications.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine spindle fully stopped and locked out per applicable shop safety procedures. Ensure the chuck or collet is clean and correctly sized for the 6.00 mm shank diameter before securing the bit. Verify runout with a dial indicator when tolerance is critical. Do not exceed the recommended maximum drilling depth of 17.00 mm per plunge without retracting to clear chips.